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A source told Page Six: "Watson was offered the lead female role, but she initially wouldn’t commit. Then she began making demands, like rehearsals for the film must be done in London — for a film called La La Land!

(Image: Disney)

Miles Teller (Image: PA)

“Producers finally cast Emma Stone — and once she was on board, Ryan Gosling jumped at the chance to work with her again.”

However, a different source revealed that Watson's Beauty & the Beast commitments meant she couldn't take on the role thanks to a filming clash.

An insider also claimed that Miles Teller wanted two million more than the $4 million he was offered for the role that would go to Gosling.